Sunlight is effectively free energy. Our bodies use it to convert cholesterol into vitamin D. You can focus it onto food to cook it with almost-free mirror cardboard/plastic. When it shines on your house, you get free heat. (You might not want it but it's free.) Sunlight dries hay, coffee beans, garlic bulbs, cloves, wet clothing ... all for free.

Sunlight is effectively free energy. Our bodies use it to convert cholesterol into vitamin D. You can focus it onto food to cook it with almost-free mirror cardboard/plastic. When it shines on your house, you get free heat. (You might not want it but it's free.) Sunlight dries coffee beans, garlic bulbs, cloves, wet clothing ... all for free.

Sunlight is effectively free energy. Our bodies use it to convert cholesterol into vitamin D. You can focus it onto food to cook it with almost-free mirror cardboard/plastic. When it shines on your house, you get free heat. (You might not want it but it's free.) Sunlight dries coffee beans, garlic bulbs, cloves ... all for free.

Sunlight is effectively free energy. Our bodies use it to convert cholesterol into vitamin D. You can focus it onto food to cook it with almost-free mirror cardboard/plastic. When it shines on your house, you get free heat. (You might not want it but it's free.)

Sunlight is effectively free energy. Our bodies use it to convert cholesterol into vitamin D. You can focus it onto food to cook it with almost-free mirror cardboard/plastic.